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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCUDACXX___FUNCTIONAL_NOT_FN_H
#define _LIBCUDACXX___FUNCTIONAL_NOT_FN_H
#ifndef __cuda_std__
#include <__config>
#endif // __cuda_std__
#include "../__functional/invoke.h"
#include "../__functional/perfect_forward.h"
#include "../__type_traits/decay.h"
#include "../__type_traits/enable_if.h"
#include "../__type_traits/is_constructible.h"
#include "../__type_traits/is_move_constructible.h"
#include "../__utility/forward.h"
#if defined(_CCCL_IMPLICIT_SYSTEM_HEADER_GCC)
# pragma GCC system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_CLANG)
# pragma clang system_header
#elif defined(_CCCL_IMPLICIT_SYSTEM_HEADER_MSVC)
# pragma system_header
#endif // no system header
_LIBCUDACXX_BEGIN_NAMESPACE_STD
#if _LIBCUDACXX_STD_VER > 14
struct __not_fn_op {
template <class... _Args>
_LIBCUDACXX_HIDE_FROM_ABI _LIBCUDACXX_INLINE_VISIBILITY
_LIBCUDACXX_CONSTEXPR_AFTER_CXX17 auto operator()(_Args&&... __args) const
noexcept(noexcept(!_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Args>(__args)...)))
-> decltype( !_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Args>(__args)...))
{ return !_CUDA_VSTD::invoke(_CUDA_VSTD::forward<_Args>(__args)...); }
};
template <class _Fn>
struct __not_fn_t : __perfect_forward<__not_fn_op, _Fn> {
using __base = __perfect_forward<__not_fn_op, _Fn>;
#if defined(_LIBCUDACXX_COMPILER_NVRTC) // nvbug 3961621
constexpr __not_fn_t() noexcept = default;
_LIBCUDACXX_TEMPLATE(class _OrigFn)
_LIBCUDACXX_REQUIRES( _LIBCUDACXX_TRAIT(is_same, _Fn, __decay_t<_OrigFn>))
_LIBCUDACXX_INLINE_VISIBILITY constexpr
__not_fn_t(_OrigFn&& __fn) noexcept(noexcept(__base(_CUDA_VSTD::declval<_OrigFn>())))
: __base(_CUDA_VSTD::forward<_OrigFn>(__fn))
{}
#else
using __base::__base;
#endif
};
template <class _Fn, class = enable_if_t<
is_constructible_v<decay_t<_Fn>, _Fn> &&
is_move_constructible_v<decay_t<_Fn>>
>>
inline _LIBCUDACXX_INLINE_VISIBILITY
_LIBCUDACXX_CONSTEXPR_AFTER_CXX17 auto not_fn(_Fn&& __f) {
return __not_fn_t<decay_t<_Fn>>(_CUDA_VSTD::forward<_Fn>(__f));
}
#endif // _LIBCUDACXX_STD_VER > 14
_LIBCUDACXX_END_NAMESPACE_STD
#endif // _LIBCUDACXX___FUNCTIONAL_NOT_FN_H
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